33results about How to "No edge warping" patented technology

The invention discloses a perspective film and a manufacturing method thereof. The perspective film comprises a perspective membrane and a piece of backing paper, wherein the perspective membrane is printed with a developing printing layer; a plurality of light holes are densely distributed on the developing printing layer; the perspective membrane is adhered to the backing paper. In the invention, the developing printing layer is directly printed on the perspective membrane and makes images spray drawn on the perspective membrane clear; and the plurality of light holes are densely distributed on the developing printing layer, so the light-transmitting and perspective effects can be achieved while the clear image is guaranteed; and the perspective film is not holed, and the perspective membranes at the position of the light holes can also be inked and colored, so the image precision is high, the definition of the front image is much higher than that of the traditional one-way perspective, and the images can be displayed from backside without being influenced by ray intensity on two sides of a transparent plate and the developing printing layer is arranged on the perspective membrane, so production efficiency is greatly improved, manufacturing is more convenient, waste ratio is lower and production cost is low.

The invention discloses a FDM (fused deposition modeling) 3 D (three dimensional) printing cold plate molding resin membrane which has a thickness of 50-250mum, and comprises a hot melt layer, a base layer and a non-setting adhesive layer, the thickness ratio of hot melt layer to base layer to non-setting adhesive layer is 17-23:17-23:9-11; the hot melt layer is ethylene-vinyl acetate copolymer; the base layer contains high density polyethylene (75-85wt%), linear low density polyethylene (5-15wt%) and calcium carbonate (1-10wt%); the non-setting adhesive layer is an oily non-setting adhesive. The FDM (fused deposition modeling) 3 D (three dimensional) printing cold plate molding resin membrane has the advantages of low cost, when in use, a baseplate with a smooth and flat surface is required, and special requirements on the texture are not required. The problem of high cost of traditional 3D printing baseplates and adhesive films can be solved, and the problems of low safety and large machine loss caused by heating of the baseplates can be solved. In addition, the FDM (fused deposition modeling) 3 D (three dimensional) printing cold plate molding resin membrane is not only suitable for printing small-sized items, but also suitable for printing large-sized items (with the length, width and height up to 500mm), and edge warping problem may not be produced when in printing of the large-sized items.

The invention provides a novel thermal contraction film slitting device of a swing structure. The slitting device comprises a rolling shaft, constant speed rollers, positioning rollers, a power roller, a detection roller, a CCD sensor, an enabling roller, a rolling-out roller, an unrolling and deviation rectification execution mechanism and a swing device. The rolling shaft, the constant speed rollers, the positioning roller (4), the power roller, the detection roller, the CCD sensor, the enabling roller, the rolling-out roller and the unrolling and deviation rectification execution mechanism are connected in sequence; the swing device comprises a driving system, a sleeve, a breather pipe, a cutting knife arm, slitting knife blades, a cutting knife arm fixing track and a cylinder, the slitting knife blades are fixed on the cutting knife arm which moves on the cutting knife arm fixing track, one end of the cutting knife arm fixing track is in sliding contact with the driving system of the swing device, and the other end of the cutting knife arm fixing track is connected with the cylinder; the driving system comprises a frequency converter, the frequency converter controls a servo motor and is combined with an eccentric wheel through a driving shaft, and when the eccentric wheel rotates, the cutting knife arm fixing track (14) making contact with the eccentric wheel does reciprocating motion because of changes of the rotation radius; a thermal contraction film penetrates through the slitting knife blades and is slit between the positioning rollers.

The preparation method of the low thermal expansion coefficient polyimide film of the present invention comprises the following steps: (1) placing pyromellitic dianhydride and p-phenylenediamine in a dimethylacetamide solvent for polycondensation reaction to obtain polyamic acid Glue A; (2) 2,3',3,4'-biphenyltetracarboxylic dianhydride and 4,4'-diaminodiphenyl ether were placed in dimethylacetamide solvent for polycondensation reaction to obtain poly Amic acid glue B; (3) polyamic acid glue A and polyamic acid glue B are mixed, and high-speed stirring reaction is obtained polyamic acid glue C; (4) polyamic acid solution C is made by casting process Form a film, and finally send the film into an imidization furnace for treatment to obtain the polyimide film with low thermal expansion coefficient. The CTE of the low thermal expansion coefficient polyimide film prepared by the invention is 15-17ppm / K, and it also has performance advantages such as high strength, high stability and high electric strength.

The invention discloses a preparation method of a veneer for wood flooring, which comprises the following steps: (1) sorting the substrate and the panel; (2) configuring an adhesive: the adhesive includes the following raw materials in parts by weight: urea-formaldehyde resin: 90-95 parts; polyvinyl acetate: 15-20 parts; titanate coupling agent: 1-2 parts; chlorinated olefins: 0.5-1 parts; retarder: 0.1-0.5 parts; curing agent: 0.5-1 parts; Agent: 10-15 parts; mix and stir the above raw materials until the glue is a paste-like viscous liquid, and it is obtained; (3) glue coating; (4) veneer; (5) pressing; (6) trimming and sawing; Surface finishing of the pressed planks and edge sawing to the required specifications, vested. The wood floor veneer prepared by the method has strong bonding strength, which ensures that no edge warping occurs during use.

The invention proposes a polyimide film with low thermal expansion coefficient and a preparation method thereof. By introducing structural units such as ester bonds into the molecular structure, the polyimide film with low thermal expansion coefficient and high mechanical performance is obtained.

The invention discloses a green casting level automobile film and a preparation method thereof. The film is successively provided with a color layer, a pressure-sensitive glue layer and release paper. A reflective layer is arranged between the color layer and the pressure-sensitive glue layer. The reflective layer is a white polyurethane layer or a white polyester resin layer. The green casting level automobile film mainly uses materials such as polyurethane and polyester resin, and the layers are combined through a coating process. The prepared casting level automobile film is good in elasticity. An edge warping phenomenon is unlikely to happen in a film pasting process, the construction efficiency is high and the yield is high. A protective layer is further arranged on the other side of the color layer of the casting level automobile film, so that the inner structure of the automobile film is protected well. The film can be of a capsule structure and can be made from a nanoscale material, so that the film is good in self-repairing property and high in self-cleanliness.

The preparation method of the polyimide film of the present invention comprises the following steps: (1) placing pyromellitic dianhydride and 4,4'-diaminodiphenyl ether in a dimethylacetamide solvent for polymerization reaction to obtain Polyamic acid glue A; (2) 3,3',4,4'-benzophenone tetracarboxylic dianhydride and p-phenylenediamine are placed in dimethylacetamide solvent for polymerization reaction to obtain polyamide Acid glue B; (3) mixing polyamic acid glue A and polyamic acid glue B; (4) preparing nano-montmorillonite ultrafine powder dispersion; (5) mixing nano-montmorillonite ultrafine powder The body dispersion is fully dispersed in the multi-component polyamic acid glue to obtain the polyamic acid composite glue; (6) the polyamic acid composite glue is made into a film through the salivation molding process, and finally the film is sent into the imidization furnace After processing, the polyimide film is obtained. The polyimide film prepared by the invention has performance advantages such as low coefficient of thermal expansion, high strength, high stability and high electric strength.